Lanagan, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.9 °F (low) to 69.5 °F (high). Annual precipitation averages 46.3 Inches. Lanagan is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 24.9 °F | 46.9 °F | 2.6 in. |
| February | 28.3 °F | 51.4 °F | 2.29 in. |
| March | 36.8 °F | 60.7 °F | 3.69 in. |
| April | 45.8 °F | 70.1 °F | 5.01 in. |
| May | 55.7 °F | 76.8 °F | 6.55 in. |
| June | 64.7 °F | 84.8 °F | 4.54 in. |
| July | 68.8 °F | 90.1 °F | 3.75 in. |
| August | 67.0 °F | 89.7 °F | 3.27 in. |
| September | 58.8 °F | 82.2 °F | 4.09 in. |
| October | 46.9 °F | 71.5 °F | 3.95 in. |
| November | 36.7 °F | 60.0 °F | 3.61 in. |
| December | 28.2 °F | 49.7 °F | 2.93 in. |
| Annual | 46.9 °F | 69.5 °F | 46.28 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |